8 Step Guide to a Total Polystorm System
Below is an 8 step guide in creating a Polystorm System
Step 1 - Select Modular Cell
Polystorm Lite – PSM2
Polystorm Lite has been specifically designed for non-trafficked applications. With a 20 tonne per square metre compressive strength it will withstand and support the load of general maintenance vehicles such as grass cutters. Typically used in landscaped areas, pedestrianised areas at lower depths.
Polystorm Lite – PSM2 Polystorm Lite has been specifically designed for non-trafficked applications. With a 20 tonne per square metre compressive strength it will withstand and support the load of general maintenance vehicles such as grass cutters. Typically used in landscaped areas, pedestrianised areas at lower depths.
Polystorm-R – PSM1A The standard Polystorm cell for trafficked and loaded applications at greater depths, has a compressive strength of 61 tonnes per square metre and the added benefits of a higher recycled material content. Ideally suited for housing, commercial and infrastructure projects.
Polystorm – PSM1 The Polystorm cell made of virgin material has a 44 tonnes per square metre compressive strength and is ideally suited for attenuation or infiltration under trafficked and loaded areas at greater depths.
Polystorm Xtra – PSM3 Designed for use in deeper burial depths, heavily trafficked applications, Polystorm Xtra has a compressive strength of 83 tonnes per square metre, making it suitable for very heavily trafficked areas, deep applications and where reduced cover is required.
Connection Accessories:
Brick Bond Connectors – PSMBBSC
Clips – PSMCLIP
Shear Connectors - PSMSC
2. Select Access If Maintenance and Inspection Is Required
Polystorm Access Polystorm Access provides a 1m x 0.5m vertical shaft within a Polystorm geocellular structure to enable surface access for remote camera inspection and maintenance activities such as flushing and rodding. The system consists of a 500mm diameter shaft which extends from surface level to the top of a Polystorm structure at which point a turret provides an interface between the shaft and the inspection chamber within the Polystorm structure.
Polystorm Inspect – PSM4 The Polystorm Inspect cell is complementary to the Polystorm range of modular cell solutions. Its primary purpose is to provide a tunnel along the length of a fully installed Polystorm structure to enable access for inspection and maintenance. Polystorm Inspect is a high strength thermoplastic cell which evenly distributes its load through the Polystorm structure. The tunnel end is left open by default but the unit can be closed off if required by clipping into place the moulded end plate. For purposes of identification the cell features a yellow center section and end plate.
3. Select If Treatment Is Required
Permavoid Medium Duty with Biomat Comprising of a high strength, low density, oil treating geo-synthetic floating mat for use with the Polystorm range of modular geocellular units. For multi-stage oil interception, the Permavoid Medium Duty with Biomat can be used in conjunction with Permachannel (linear treatment) or a pre-fabricated RIDGISTORMSeparate Weir and Baffle Chamber (point treatment).
4. Select Wrap
Geomembrane for retention and attenuation An impermeable membrane for wrapping around geocellular structures to form watertight tanks. This is then wrapped in a geotextile which protects the geomembrane during installation.
Permafilter Geotextile for infiltration This geotextile has been specifically designed to remove hydrocarbon pollution, treating the captured water before infiltrating it into the ground for treatment and infiltration.
Permatex 300 for infiltration or protection A non-woven protective geotextile for infiltration solutions or can be used for soakaway infiltration solutions or to wrap a geocellular tank before a geomembrane is installed for added protection.
5. Flange Connections
A Flange Adaptor is attached at both the inlet and outlet points to allow water to enter and exit the tank.
Flange Adaptor to EN1401
Polystorm cell with Drainage Flange Connection
6. Venting
Every attenuation tank required at least one vent to maximize hydraulic performance, reduce stress on encapsulating Geomembranes and avoid stagnant water. This can be done by installing either a Vent Cowl or a connection pipe to vent air directly into an upstream chamber.
Vent Cowl: SCV40
BS EN 1401-1 pipe: UG430
150mm Ridgidrain pipe for ventilation into the upstream chamber
7. Associated Upstream Chambers
Ridgidrain: Ridgidrain can be utilized within a Polystorm system by allowing captured surface water to enter the attenuation or infiltration tank.
Ridgistorm Separate Chambers are self-cleaning and prevent the ingress of debris, silt, organic and even other particles into the Polystorm structure extending its useful life.
Silt Trap – Small diameter (320-460mm): Silt traps are available from the Ridgistorm Separate Silt Traps range.
Ridgistorm Separate Catchpits – Larger diameter (450-3000mm): Catchpits are available from the Ridgistorm Separate range.
Ridgistorm Separate Weir and Baffle & Filter Chambers - In addition to silt traps and Catchpits, we also offer Ridgistorm Separate Weir and Baffle Chambers and Ridgistorm Separate Filter Chambers with additional treatment features.
8. Associated Downstream Chambers
Ridgistorm Check A choice of Vortex or Orifice Plate Flow Control Chambers for precise control of site discharge rates.
Ridgistorm Control Pre-fabricated structured wall chambers which feature ‘in-line’ system components such as penstocks, gate valves or flap valves to control system flows and facilitate maintenance.
Ridgidrain Ridgidrain can be utilised to drain away stored water from a Polystorm attenuation tank.